Storage Unit Sizes: Which One Do You Need?
Choosing the right storage unit size can feel like guesswork. Pick something too small and you are stuck cramming boxes, stacking furniture dangerously high, or renting an extra unit. Go too big and you pay for empty space month after month. When you are already planning a move, that is the last kind of surprise you need.
This guide walks through common storage unit sizes, what realistically fits in each, and how to estimate how much space you actually need. We will also cover packing strategies that let you fit more into a unit safely, plus how Atlas Route Moving can combine moving and storage so you are not juggling multiple companies.
Whether you are staging a home for sale, remodeling, downsizing, or relocating out of state, understanding storage unit sizes helps you budget, protect your belongings, and avoid last-minute stress on moving day. Use this as your step-by-step storage size guide as you plan your move.
Keep this page handy while you make your inventory list or talk with your mover. By the end, you will be able to answer the question, «How much storage do I need?» with confidence and book a unit that actually fits your life.
Key takeaways
- Most people over- or underestimate storage unit sizes because they only think in square feet, not in stackable height and layout.
- A 5×10 unit typically fits a studio or small one-bedroom; a 10×10 fits most one- to two-bedroom apartments.
- Make a detailed item list and group items by size (small boxes, large furniture, appliances) to estimate space more accurately.
- Good packing (uniform boxes, labeling, shelving, and disassembling furniture) can reduce the size you need and protect items better.
- Access needs matter: if you will visit the unit frequently, plan for walking aisles instead of filling every inch of floor space.
- Climate control, location, and length of stay affect storage costs as much as unit size does.
- Combining moving, packing, and secure storage services with one company keeps your schedule and inventory organized.
How storage units are measured
Most storage facilities describe storage unit sizes in feet, using width by depth measurements. For example, a 10×10 unit is roughly 10 feet wide and 10 feet deep. Height is often around 8 feet, but that can vary by facility.
When you compare storage unit sizes, remember you are not just working with floor space. You can stack boxes and lighter items up toward the ceiling. The real capacity of a unit is closer to cubic feet:
- 5×5 unit at 8 feet high: about 200 cubic feet
- 5×10 unit at 8 feet high: about 400 cubic feet
- 10×10 unit at 8 feet high: about 800 cubic feet
- 10×20 unit at 8 feet high: about 1,600 cubic feet
Most people do not fill height efficiently, which is why a realistic storage size guide also considers the shape and weight of what you are storing.
Square footage vs. real-world capacity
Two units with the same square footage can feel very different in real use. A long, narrow unit may be harder to use than a squarer one. Think about:
- Door width: Wider doors make it easier to move in sofas, mattresses, and appliances.
- Ceiling height: Higher ceilings give you more stacking room, but only if you pack safely.
- Interior layout: If you need to access boxes in the back, you will lose some space to walking paths.
For planning, it helps to think in terms of rooms. Roughly:
- Small closet-sized units (5×5) = a small walk-in closet
- Medium units (5×10, 10×10) = a studio to small apartment
- Large units (10×15, 10×20, 10×30) = a multi-bedroom home or business inventory
Quick comparison of common storage unit sizes
Use this overview as a starting point to choose a storage unit. We will go into each size in more detail in later sections.
| Unit size | Rough equivalent | Typical use |
|---|---|---|
| 5×5 | Small walk-in closet | Seasonal items, boxes, small furniture pieces |
| 5×10 | Large walk-in closet | Studio or small one-bedroom contents |
| 10×10 | Average bedroom | One- to two-bedroom apartment |
| 10×15 | Large bedroom | Two- to three-bedroom home (without major appliances) |
| 10×20 | One-car garage | Three- to four-bedroom home, including appliances |
| 10×30 | Large garage | Larger homes, full contents plus outdoor furniture |
Keep in mind that this is only a guideline. If your home has very full closets, oversized sectionals, or a lot of garage and basement storage, you may need to size up.
What fits in a 5×5 storage unit
A 5×5 unit is one of the smallest standard storage unit sizes, similar to a small walk-in closet. It is a good option when you need just a bit of extra space, not full-home storage.
Typical capacity of a 5×5 unit
- 5–10 small to medium moving boxes
- Several plastic bins or file boxes
- A small dresser or nightstand
- A twin mattress set (stood upright)
- Sports gear, musical instruments, or compact shelving
- Seasonal items like holiday decor or a window AC unit
It is not a good fit for a full apartment, large sofa, or multiple mattresses. If you are moving, think of a 5×5 as overflow space rather than primary storage.
Best uses for a 5×5 unit
- Students storing dorm room items over the summer
- Short-term storage while painting or re-carpeting a room
- Storing business records or archival files
- Keeping off-season clothing or decor out of your main closets
Example: You live in a one-bedroom and just need to clear out holiday decor, a few boxes of books, and some off-season clothes to make your closet more manageable. A 5×5 unit is usually enough.
5×10 vs 10×10 storage units
Two of the most commonly compared storage unit sizes are 5×10 and 10×10. Many people are not sure which one they need for a small apartment or partial home storage. Understanding the real difference between a 5×10 vs 10×10 storage unit can keep you from overpaying or running out of space.
What fits in a 5×10 storage unit
A 5×10 unit offers about 50 square feet of floor space. It is roughly the size of a large walk-in closet or a small utility room.
- 10–20 medium moving boxes
- A love seat or compact sofa
- A dresser and small desk
- Several chairs or a small dining set (with chairs stacked)
- Bicycles or small outdoor equipment
In practical terms, a 5×10 can usually hold the contents of a studio or very small one-bedroom apartment, if you pack efficiently and do not have large appliances.
Example: You are moving from a furnished studio and need to store your bed, nightstand, a small sofa, and about a dozen boxes. A 5×10 is often enough, especially if you disassemble the bed.
What fits in a 10×10 storage unit
A 10×10 unit doubles the floor space to 100 square feet. It is about the size of a small bedroom and is one of the most flexible storage unit sizes.
- 20–40 medium boxes
- Queen mattress set, bed frame, and headboard
- Sofa and loveseat or sectional (depending on size)
- Coffee table, side tables, and up to two dressers
- Small dining set
- Several bookshelves or storage racks
Most one-bedroom apartments and some two-bedrooms can fit in a 10×10 unit, particularly if you are not storing every single closet item or bulky sports equipment.
Side-by-side comparison: 5×10 vs 10×10 storage
| Feature | 5×10 unit | 10×10 unit |
|---|---|---|
| Floor space | 50 sq. ft. | 100 sq. ft. |
| Home size equivalent | Studio or small one-bedroom (minimal furniture) | One-bedroom or small two-bedroom |
| Furniture fit | One small sofa, one bed, a few small pieces | Larger sofa or sectional, multiple beds, more furniture |
| Best for | Tight budgets and minimal belongings | Flexibility, extra closets, some appliances |
If you are asking, «How much storage do I need for a one-bedroom apartment?» a 10×10 is usually the safer, more flexible choice—especially if you have a queen bed, sofa, and standard living room furniture.
Larger storage units for whole-house moves
For full-house moves or long-term storage of household goods, you will likely need a larger unit. Here is what typically fits in 10×15, 10×20, and 10×30 units.
10×15 storage unit
About 150 square feet of floor space, similar to a large bedroom.
- Two- to three-bedroom home contents (without a garage full of items)
- Multiple beds and dressers
- Larger sofa or sectional, chairs, coffee/end tables
- Dining table with chairs
- Several large appliances (if needed)
- 20–50 boxes depending on furniture volume
This is a common choice for families remodeling a main floor or storing between home sale and new home closing.
10×20 storage unit
About 200 square feet of floor space, the size of a standard one-car garage.
- Three- to four-bedroom home contents
- Living room and family room furniture
- Multiple bedroom sets
- Kitchen appliances such as refrigerator, stove, washer/dryer
- Garage or outdoor items like grills, bikes, and patio furniture
- Dozens of boxes and storage tubs
If you have a lot of bulky or irregularly shaped items, a 10×20 gives you more flexibility to create aisles and protect fragile pieces.
10×30 storage unit
About 300 square feet of floor space, similar to a large garage. This size is less common but useful for:
- Larger homes with four or more bedrooms
- Household contents plus extensive garage, attic, and basement storage
- Home-based business inventory in addition to household items
- Combining two households into one storage unit
If you are moving a larger home and planning long-term storage, talk with your mover about whether one 10×30 or two smaller units would serve you better, especially if you need to access different groups of items at different times.
Whole-home storage size summary
| Home size | Usually works | Consider sizing up if |
|---|---|---|
| Studio / small 1-bedroom | 5×10 or 10×10 | You have lots of boxes or bulky furniture |
| Standard 1-bedroom | 10×10 | You are storing appliances or outdoor gear |
| 2-bedroom apartment / small home | 10×10 or 10×15 | You have a garage or many large items |
| 3-bedroom home | 10×15 or 10×20 | You are storing long term or want walking aisles |
| 4+ bedroom home | 10×20 or 10×30 | You have extensive storage, hobbies, or business items |
How to estimate how much storage you need
Instead of guessing, take 15–30 minutes to walk through your home and list what will actually go into storage. This simple process will give you a much better sense of the storage unit sizes to consider.
Step 1: Decide what is really going into storage
- Separate items that will go directly to your new home from those that will be stored.
- Decide whether items in your garage, attic, shed, or basement are coming with you or being donated, sold, or discarded.
- Use a notepad or spreadsheet and make two columns: Move now and Store.
Sample wording you might use in your notes:
«Store: guest bedroom furniture, holiday decor, extra bookcases, patio set, 10 large boxes of archived paperwork.»
Step 2: Group items by size
Once you have a storage list, group items into categories:
- Small boxes (books, kitchen items, office supplies)
- Medium / large boxes (clothing, bedding, mixed household items)
- Very large boxes (wardrobe boxes, oversized decor)
- Furniture (beds, sofas, tables, dressers, desks, shelves)
- Appliances (refrigerator, washer/dryer, freezer)
- Odd-shaped items (bikes, grills, exercise equipment)
This makes it easier for a mover or storage specialist to recommend a size and helps you visualize the space.
Step 3: Count boxes and big pieces
A rough guide many moving professionals use:
- Studio: 15–20 boxes
- 1-bedroom: 20–30 boxes
- 2-bedroom: 30–40 boxes
- 3-bedroom: 40–60+ boxes
If you are storing only part of your home, you may be on the lower end. Note how many large pieces of furniture and appliances you have. These take up most of your floor space in a unit.
Step 4: Match your list to likely unit sizes
Use this simplified matching table as a starting point for your storage size guide:
| Your storage list looks like… | Likely unit size | Notes |
|---|---|---|
| 10–15 boxes, no furniture | 5×5 | Stack boxes and use shelving if available. |
| 15–25 boxes, a bed, and a small sofa | 5×10 | Works for a studio or minimalist 1-bedroom. |
| 25–35 boxes, 1 bedroom set, full living room | 10×10 | Good for most standard 1-bedroom apartments. |
| 35–50 boxes, 2–3 bedroom sets, appliances | 10×15 or 10×20 | Choose 10×20 if you want more aisle space. |
| 50+ boxes, 4+ bedrooms, plus garage contents | 10×20 or 10×30 | Larger homes often benefit from 10×30. |
Step 5: Consider access and duration
If you plan to load your storage unit and not touch it for months, you can safely pack it more tightly. If you need regular access to seasonal clothing, business files, kid items, or tools, plan for:
- A center aisle you can walk down
- Space to pull out and restack boxes safely
- Clearly labeled zones (for example: «Winter gear,» «Business documents»)
In those cases, it can be worth choosing a slightly larger unit size so you are not climbing over boxes or moving heavy items each visit.
Packing tips to fit more into any unit
How you pack can change which storage unit sizes will work for you. Two people with the same belongings can need very different unit sizes depending on their packing approach.
Use consistent box sizes
- Choose 1–2 box sizes for most items. This makes stacking safer and more stable.
- Avoid lots of random grocery store boxes with weak sides.
- Label all four sides of each box so you can find things quickly, even when stacked.
Disassemble furniture when possible
- Take legs off tables and remove shelves from bookcases.
- Stand mattresses and box springs upright to save floor space.
- Bundle bed rails and hardware in labeled bags taped to the frame.
Sample label wording:
«Master bedroom bed – hardware in bag taped to headboard – box 12 of 40.»
Protect and wrap smartly
- Use furniture pads or moving blankets to wrap wood and upholstered furniture.
- Cover mattresses with breathable covers to reduce dust.
- Do not wrap items in plastic tightly for long-term storage in non-climate-controlled units, as trapped moisture can cause damage.
Stack by weight and frequency of use
- Heaviest boxes on the bottom, lighter on top.
- Place items you will need soonest near the front or in clearly marked zones.
- Leave at least a small pathway if you expect to access the unit.
Maximize vertical space safely
To safely use full height:
- Place sturdy furniture (dressers, bookcases) along the back wall.
- Stack lighter boxes on top, not heavier than you can safely lift.
- Do not stack so high that boxes become unstable or crush what is underneath.
These packing strategies often let you choose a slightly smaller unit without making it impossible to access what you need.
What affects the cost of a storage unit
Storage unit cost is not just about size. When you compare options or talk to a moving company that offers storage, keep these factors in mind.
Main storage cost factors
| Cost factor | How it affects price | What to consider |
|---|---|---|
| Unit size | Larger units generally cost more each month. | Balance space needs with budget and packing efficiency. |
| Climate control | Climate-controlled units usually cost more than standard units. | Worth it for electronics, wood, art, and fabrics. |
| Location | Urban areas with high demand tend to have higher rates. | Slightly farther locations can sometimes reduce cost. |
| Access type | Drive-up units vs. indoor upper-floor units may be priced differently. | Drive-up is more convenient for heavy items. |
| Length of stay | Longer stays may qualify for discounts, or rates may change over time. | Ask about long-term vs. short-term pricing. |
Choosing climate control vs. standard storage
For short-term storage during a move in moderate weather, standard units often work well. Consider climate-controlled storage if you are storing:
- Electronics and computers
- Musical instruments
- Fine art or photos
- Antique or solid wood furniture
- Important paper records
Climate control does not change the size you need, but it affects how well your belongings hold up over time.
Common storage mistakes and how to avoid them
Even with the right storage unit size, a few common mistakes can lead to damage, frustration, or higher costs. Here is what to watch for.
| Mistake | What can happen | Better approach |
|---|---|---|
| Guessing your unit size the day of the move | Too small or too big, last-minute changes, extra trips. | Make an inventory list and choose in advance. |
| Storing items you will never use again | Paying monthly to store clutter. | Declutter before storage; donate or sell items. |
| Using weak or mismatched boxes | Boxes collapse, damage to contents, unstable stacks. | Use sturdy, similar-sized moving boxes. |
| Packing without a map or labels | Hard to find items, repeated digging through stacks. | Label boxes clearly and note what zones they go in. |
| Storing prohibited or perishable items | Pests, odors, or violations of storage rules. | Check facility rules; avoid food, plants, and hazardous items. |
Taking the time to plan your storage unit and how items will be placed can save money and protect your belongings.
How to prepare your items before they go into storage
Proper preparation matters as much as choosing the right storage unit size. Here is a checklist to follow before your movers arrive or before you load the unit yourself.
Storage preparation checklist
- Clean and dry appliances thoroughly; leave doors slightly open to prevent odors.
- Wipe down furniture and allow it to dry completely.
- Use mattress covers and furniture pads for protection.
- Pack fragile items with plenty of padding and mark boxes «Fragile» on multiple sides.
- Number your boxes and create a simple box list (for example: Box 1 – kitchen basics; Box 2 – winter clothes).
- Photograph valuable items and note their condition before storage.
- Place heavier items in smaller boxes to keep them manageable.
Plan your layout inside the unit
- Place heavy items and appliances at the back and along the sides.
- Store mattresses and sofas on edge to save space, with protection.
- Use shelves or bookcases as makeshift storage for smaller boxes.
- Keep fragile items off the ground and away from heavy stacks.
- Consider a simple sketch of your unit layout so you remember where key items are.
When Atlas Route Moving handles both moving and storage for you, your crew can pack items with the storage layout in mind, reducing the chances of damage and making later access easier.
Helpful Atlas Route Moving services
Coordinating moving and storage with Atlas Route Moving
When you are moving and storing at the same time, coordination matters. Handling each piece separately—one company for the move, another for storage, and your own DIY packing—often leads to miscommunications, extra fees, and more physical work than necessary.
Atlas Route Moving can help streamline the process by combining your move and storage into one organized plan. As a professional moving company offering secure storage services, Atlas Route Moving can:
- Review your inventory and recommend realistic storage unit sizes.
- Pack and wrap your items so they are ready for safe storage, not just short transport.
- Load the truck with storage items grouped together, so unloading into storage is faster and more organized.
- Place items in storage according to a layout that matches your access needs (for example, seasonal items toward the front).
- Coordinate delivery from storage to your new home when you are ready.
This type of coordinated plan can be especially helpful if you are:
- Storing belongings between selling your current home and closing on a new one.
- Remodeling and need parts of your home emptied in stages.
- Relocating out of state and need a safe place to hold items before you secure permanent housing.
Example plan:
«Store: guest room and office contents for 6–12 months. Keep: everyday living room and primary bedroom furniture. Movers pack storage items first, place them in a 10×15 unit, then deliver the remaining items directly to the new home.»
What to keep with you instead of in storage
Even if you choose the perfect storage unit size, some items are better off staying with you. Think of storage as a safe, temporary home for non-essential belongings, not everything you own.
Items to keep out of storage
- Important documents: Birth certificates, passports, financial records, wills, and insurance policies.
- High-value jewelry and small valuables: Store these in a secure location you control.
- Prescription medications: Always keep current medications with you.
- Daily-use electronics: Laptops, tablets, work equipment you use regularly.
- Irreplaceable sentimental items: If something would be devastating to lose, consider keeping it close or storing it in a very secure, climate-controlled environment.
- Perishables and hazardous materials: Food, plants, gasoline, paint, and similar items should not go into storage.
Prepare a «do not store» area
Before your move or storage date, designate a «do not store» zone in your home where you place these important items. Let your movers know clearly which areas are not to be loaded into storage.
Helpful wording to tell your movers:
«Everything labeled with a red sticker stays with me and does not go into the storage unit.»
Frequently asked questions
How do I know what storage unit size I need?
Start by listing what you are actually storing, not your entire home. Count boxes, note furniture and appliances, then compare your list to common storage unit sizes like 5×10, 10×10, and 10×20. When in doubt, talk with a moving and storage specialist and share your item list.
Is a 5×10 storage unit big enough for a one-bedroom apartment?
A 5×10 can work for a very minimalist one-bedroom or studio, especially if the apartment is partially furnished by a landlord. Most standard one-bedrooms fit more comfortably in a 10×10, especially if you have a sofa, dining set, and bedroom furniture.
What fits in a 10×10 storage unit?
A 10×10 unit typically fits contents from a one-bedroom or small two-bedroom apartment: a bedroom set, sofa, chairs, small dining set, and 20–35 boxes. It is one of the most flexible storage unit sizes for apartment moves.
Do I need climate-controlled storage?
If you are storing items short term and they are not temperature sensitive, a standard unit may be fine. Choose climate-controlled storage if you are storing for several months or more and have electronics, wood furniture, instruments, artwork, or important documents.
Can I change storage unit sizes later?
Most facilities let you transfer to a different size, but availability is not guaranteed and it requires moving items between units. Estimating your needs up front can help you avoid this extra step and any additional moving labor.
How can I fit more into a smaller storage unit?
Use sturdy, consistent box sizes; disassemble furniture; stand mattresses and sofas upright; and stack boxes by weight. Plan a layout so you are using vertical space safely. Good packing practices can reduce the unit size you need without making access impossible.
How long can I keep items in storage?
You can usually rent storage month-to-month for as long as you need. For long-term storage, make sure items are packed for the long haul and consider climate control for sensitive belongings.
Can Atlas Route Moving help me choose a storage unit?
Atlas Route Moving can review your inventory, talk through your plans, and recommend an appropriate storage unit size within our secure storage services. When we handle both moving and storage, we can also load and arrange your unit efficiently.
What should I not put in a storage unit?
Avoid storing perishable food, live plants, gasoline, paint, propane tanks, fireworks, and other hazardous materials. Important documents, daily medications, and high-value small items are usually better kept with you.
Sources referenced in this guide
This guide is based on practical moving and storage experience and aligns with general consumer guidance from these types of sources:
- Federal Motor Carrier Safety Administration consumer guidance on moving and storage
- U.S. Department of Transportation moving guidance and best practices
- State transportation and consumer protection agency recommendations on household goods storage
- Written moving estimates, storage agreements, and carrier tariffs
- Facility rules and building management requirements for move-in and move-out
Before you sign a storage agreement, review your specific provider's terms, prohibited items list, and access rules so there are no surprises later.
This guide is general moving information, not legal, insurance, or regulatory advice. Moving requirements, pricing, access rules, and coverage options may vary by location, move type, building rules, and service agreement.
Related moving guides
When you are ready to plan your move and storage together, Atlas Route Moving can help you choose an appropriate storage unit size, pack efficiently, and transport everything safely. If you would like help reviewing your options or building a move-and-store plan around your timeline, you can explore our secure storage services and contact our team to discuss your inventory and schedule.